PT - JOURNAL ARTICLE AU - Arai, N. AU - Kan, H. TI - <em>Reply:</em> AID - 10.3174/ajnr.A6473 DP - 2020 Apr 01 TA - American Journal of Neuroradiology PG - E21--E21 VI - 41 IP - 4 4099 - http://www.ajnr.org/content/41/4/E21.short 4100 - http://www.ajnr.org/content/41/4/E21.full SO - Am. J. Neuroradiol.2020 Apr 01; 41